Comments:

Well it's not as a heavy hitter as if it was Joy's mom, but still this'll be interesting.
Will her sister change her attitude towards the girls or is the status quo just too strong and it won't lead anywhere after this story arc? :O

Even if she won't say that, it shouldn't be too hard for Joy to find out. After all there should be legal documents or whatever. And if not, Ed will speak. Unless he himself is torn between the fury of Joy and Kimmy.